1.Pacific Ocean
.early exploration route
2.Atlantic Ocean
.highway, settlers
.explorers,immigrants
3.Mississippi River
.transport arteries
.links to ports and the world
4.Missouri River
.transport arteries
.links to ports and the world
5.Ohio River
.gateway to the west
6.Colubia River
.lewis and clark expodition
7.Colorado River
.explorered by spanish
8.Rio Grando
.mexican border
9.Gulf Of Mexico
.french and spanish
.exploration routes
10.The Great Lakes
.inland port cities
1.Pacific Ocean
.early exploration route
2.Atlantic Ocean
.highway, settlers
.explorers,immigrants
3.Mississippi River
.transport arteries
.links to ports and the world
4.Missouri River
.transport arteries
.links to ports and the world
5.Ohio River
.gateway to the west
6.Colubia River
.lewis and clark expodition
7.Colorado River
.explorered by spanish
8.Rio Grando
.mexican border
9.Gulf Of Mexico
.french and spanish
.exploration routes
10.The Great Lakes
.inland port cities